/*
 * ========THE SOLMIX PROJECT=====================================
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.gnu.org/licenses/ 
 * or see the FSF site: http://www.fsf.org. 
 */
package org.solmix.eventservice.deliver;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;


/**
 * 
 * @author solomon
 * @version $Id$  2011-10-2
 */

public class Rendezvous extends CyclicBarrier
{
    /** Flag for timeout handling. */
    private volatile boolean timedout = false;

    /**
     * Create a Barrier for the indicated number of parties, and the default
     * Rotator function to run at each barrier point.
     */
    public Rendezvous()
    {
        super(2);
    }

    /**
     * see {@link CyclicBarrier#barrier()}
     */
    public void waitForRendezvous()
    {
        if ( timedout )
        {
            // if we have timed out, we return immediately
            return;
        }
        try
        {
            this.await();
        }
        catch (BrokenBarrierException ignore1)
        {
        }
        catch (InterruptedException ignore2)
        {
        }
    }

    /**
     * see {@link CyclicBarrier#attemptBarrier(long)}
     */
    public void waitAttemptForRendezvous(final long timeout)
    throws TimeoutException
    {
        try
        {
            this.await(timeout, TimeUnit.MILLISECONDS);
        }
        catch (BrokenBarrierException ignore1)
        {
        }
        catch (TimeoutException te)
        {
            timedout = true;
            throw te;
        }
        catch (InterruptedException ignore2)
        {
        }
    }
}
